CVSS 3.1
Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)
Атакува се
Време до експлоатация
Атакува се локално, без особени условия, с обикновен потребителски вход и без действие от потребителя.
- Експлоатация: няма данни за експлоатация
- Атаката не може да се автоматизира
Описание
Оригинално описание
In the Linux kernel, the following vulnerability has been resolved: media: dvb-core: fix wrong reinitialization of ringbuffer on reopen dvb_dvr_open() calls dvb_ringbuffer_init() when a new reader opens the DVR device. dvb_ringbuffer_init() calls init_waitqueue_head(), which reinitializes the waitqueue list head to empty. Since dmxdev->dvr_buffer.queue is a shared waitqueue (all opens of the same DVR device share it), this orphans any existing waitqueue entries from io_uring poll or epoll, leaving them with stale prev/next pointers while the list head is reset to {self, self}. The waitqueue and spinlock in dvr_buffer are already properly initialized once in dvb_dmxdev_init(). The open path only needs to reset the buffer data pointer, size, and read/write positions. Replace the dvb_ringbuffer_init() call in dvb_dvr_open() with direct assignment of data/size and a call to dvb_ringbuffer_reset(), which properly resets pread, pwrite, and error with correct memory ordering without touching the waitqueue or spinlock.
Засегнати продукти
- Linux Linux: 34731df288a5ffe4b0c396caf8cd24c6a710a222 преди 527cfa8a3486b3555c5c15e2f62be484a11398dc; 34731df288a5ffe4b0c396caf8cd24c6a710a222 преди fb378cf89be434ed1f10ab79cc4788fba8ae868d; 34731df288a5ffe4b0c396caf8cd24c6a710a222 преди f1e520ca2e83ece6731af6167c9e5e16931ecba0; 34731df288a5ffe4b0c396caf8cd24c6a710a222 преди af050ab44fa1b1897a940d7d756e512232f5e5df; 34731df288a5ffe4b0c396caf8cd24c6a710a222 преди d71781bad59b1c9d60d7068004581f9bf19c0c9d; 34731df288a5ffe4b0c396caf8cd24c6a710a222 преди cfd94642025e6f71c8f754bdec0800ee95e4f3dd; 34731df288a5ffe4b0c396caf8cd24c6a710a222 преди 32eb8e4adc207ef31bc6e5ae56bab940b0176066; 34731df288a5ffe4b0c396caf8cd24c6a710a222 преди bfbc0b5b32a8f28ce284add619bf226716a59bc0
- Linux Linux: 2.6.17; преди 2.6.17; 5.10.253 до 5.10.*; 5.15.203 до 5.15.*; 6.1.167 до 6.1.*; 6.6.130 до 6.6.*; 6.12.77 до 6.12.*; 6.18.17 до 6.18.*; 6.19.7 до 6.19.*; от 7.0 нататък
- Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem: всички версии
Вид слабост
История
- 18 март 2026 Публикувано
Други уязвимости в Linux Linux
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-23253
- https://nvd.nist.gov/vuln/detail/CVE-2026-23253
- https://git.kernel.org/stable/c/527cfa8a3486b3555c5c15e2f62be484a11398dc
- https://git.kernel.org/stable/c/fb378cf89be434ed1f10ab79cc4788fba8ae868d
- https://git.kernel.org/stable/c/f1e520ca2e83ece6731af6167c9e5e16931ecba0
- https://git.kernel.org/stable/c/af050ab44fa1b1897a940d7d756e512232f5e5df
- https://git.kernel.org/stable/c/d71781bad59b1c9d60d7068004581f9bf19c0c9d
- https://git.kernel.org/stable/c/cfd94642025e6f71c8f754bdec0800ee95e4f3dd
- https://git.kernel.org/stable/c/32eb8e4adc207ef31bc6e5ae56bab940b0176066
- https://git.kernel.org/stable/c/bfbc0b5b32a8f28ce284add619bf226716a59bc0
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html